Automatic cut-off for grain-meters



(No Model.) u*

G. MARSH.

AUTOMATIC CUT-OTT T03 GRAIN METERS. 170.355,774. j; Patented Janfll, 1887.

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UNITED STATES PATENT OFFICE.

GEORGE MARSH, OF MARSHALL, MICHIGAN.

AUTOMATIC CUT-OFF FOR GRAIN-METERS.'

SPECIFICATIONjorming part of Letters Patent No. 355,774, dated January 1l, 1887.

Application illed Api-i129, 1886. Serial No.QOOD-i. (No model).

To all whom may concern.-

Be it known that I, GEORGE MARSH, a citizen of the United States, residing at Marshall, in the county of Calhoun and State of Michigan, have invented certain new and useful Improvements in Automatic Cut-Offs for Grain- Meters, of which the following is a full, clear, and exact description. Y

My invention relates to automatic grainweighing apparatus; and the object of the invention is to regulate the flow of grain into the scale so that the stream. will always be the same size at the moment the actual weighing is done, no matter how rapidly or in what volume the grain may be introduced into the bin of the scale.

To this end the invention consists in an automatic cut-oit or regulator for the feedingspout, constructed and arranged substantially as hereinafter particularly set forth and claimed.

In the accompanying drawings, in the several figures of which like parts are similarly designated, Figure 1 is an end elevation of grain-weighing apparatus supplied with my invention, the mouth of the bin being broken out, the parts being in position when the bin is not full. Fig. 2 is a vertical section of part ofthe same, the bin being full; and Fig. 3, a perspective view of the month and my attachment. Fig. 4 is a modification.

I have shown my invention applied to a grain-weighing apparatus of substantially the construction shown in the Patent No. 297,614, granted' to me and Vindex Arnold the 29th of April, 1884, and have designated corresponding parts herein the same in that patent, for a full description of which reference is hereby made to said patent, but I do not limit the applicability of this invention to that apparatus.

The parts in Figs. l and 2 used in the patented invention referred to are r1`he two-part bin B, the gates dd, mouth, funnel, orhopper e, rock-lever p, carrying gate n, for opening and closing the two compartments ofthe bin alternately, and through connecting-rods q q simultaneously operating the discharge-gates d d, the forked-lever C, and weight l, and the finger s, fixed to the frame A for operating the rocklever p as the bin descends, to shift it and its attached gate u from one side to the other.

Suitably mounted on the i'rameA of the apparatus, as by bows a, is an inlet-spout, b, the outlet c oi" which is beveled, and provided with a lip, d, having corners f projectinginto the spout. I apply my cut-ofi-` valve or regulator g to this spout,and it consists of the plate h, ltted to the beveled outlet ofthe spout, and having the end pieces, /11 i, by which it is hinged atj by one corner to the spout; and I prefer to hold said cnt-ofi-` in the position shown-that is to say, in its closed position-by means of springs 7c acting upon lugs 0 0,projecting laterally from the sides ofthe cut-oli far enough to be engaged by the sides of the mouth c of the bin Z, the spout projecting into said mouth. Instead of springs k for closing the cut-ofi` said cut-eti' may beaeted upon by a weight. The corners ff of the lip d limit the closing movement of the eut-off and insure 'an opening or outlet in the spout at all times corresponding with the capacity of the scales. Now, it will be remembered that when the bin is emptyit is held at its highest elevation by the weight Z, Fig.,v 1, and hence the mouth ofthe bin will bear against the lugs 0 o and force open the cut-oit (see Fig. 1) toits full extent, thus leaving a full opening for the entrance oi the grain. Then the bin is filling, and at the instant the weight is being overcome, the month of the bin recedes and leaves the cnt-off free to be acted upon by its springs to close (see Fig. 2) and thus contract the volunie of incoming grain, and so prevent overweighting and consequently inaccurate measuring.

To illustrate the application of my invention take an example: Ii' one is weighing a dump a minute and desires to increase to two a minute, the volume of supply must be correspondingly,increased. When the bin hasA iilled on one side to a certain extenathe counterpoise'will begin to rise and the bin fall, but there is an interval of time between that moment and the time the valve is shifted to the other side. During this interval the grain. is running in more rapidly or in greater volume than when weighing at the slower rate, and hence the bin will be overcharged;

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but with my invention applied the out-oli' operating,` with theoutlet of saidspout, springs comes into action at this time and eontraots to hold the eut-off upon the outlet, laterally the volunie to such extent as to admit of only projecting lugs, and the upper edges of the I5 the proper quantity entering, and hence the bin adapted to engage said lugs to hold the 5 Weighing is correct. Cut-off open when the bin is filling, substan- Iu Fig. t I have shown adjustable stops f tially as described. to vary the extent of closing of the cutoff. In testimony whereof I have hereunto set That I claim is `my hand this 27th day of April, A. D. 1886. In a grain-weighing apparatus, an iulet- GEORGE MARSH. Io spout having a beveled outlet, and a lip and NVituesses:

corners for said lip ou said outlet, combined H. M. DUNHAM,

with a eut-ofi` pivoted to said spout and eo- I J. THOR?. 

